No matter where you are, before getting to Ongpin, you should first know how to get to Recto LRT.
To get to LRT Recto:
For people coming from Quezon City, ride a Jeep or FX at Quezon Ave. going to Quiapo. Get down at Morayta. Morayta is just after UST. There's a big Mcdonalds with a waiting shed. Take the overpass and walk a little bit. Nearby is the jeepney "station" going to Divisoria. Ride the Divisoria jeep which will pass thru Recto LRT.
For those with access to LRT (Not MRT):
Just ride the LRT and get down at Doroteo Jose Station and walk a little bit towards Recto. You can either walk or ride a Divisoria jeep.
Now that everybody's at LRT Recto, you should get to T Alonzo. This street is the third street from LRT. From LRT if you walk, you'll pass T. Mapua Steet (this is the Funeraria Paz St.), Then a small street (i don't know the name), then you'll see a market palengke named Aranque. The street beside Aranque is T. Alonzo. Turn left here and walk a couple of blocks. The first store you'll see from this direction is Anjieson VCD Store. You can buy lots of VCDs and some DVDs here. They also have Audio cds and Posters. Walking further, you'll now reach ongpin. If you turn right, you'll encounter Mei Ah VCD Store and another Anjieson Store (which is managed by the sister of that guy in the first Anjieson Store). Going left, there's another Mei Ah VCD Store.
Now an alternate way to get to Ongpin is to ride the LRT and get off at Carriedo Station. You should then make your way towards the Sta Cruz Rotunda. This is where Sta. Cruz Curch is also located. Ongpin st. is the street with that Filipino-Chinese Friendship Arch. It's directy opposite the church. You won't miss it. From here, the first store you'll see is Mei Ah to your right. Further is another Mei AH, this time to your left, then a couple of stores away, Anjieson. You can ask the owner there to show you to their T Alonzo Store.
That's it. We go to Ongpin regularly during Saturdays or Sundays. You can join us if you want so i can refer you to the store owners there.